Sound-box for talking-machines.



P. J. PAOKMAN.

SOUND BOX FOR TALKING MAGHINES. APPLIOATION FILED JULY 24, 1909.

960,191. Patented May 31,1910.

suitably attached.-

FERCIVAL JAMES PACKMAN, 0F

HIGHBURY, LONDON, ENGLAND.

SOUND-BOX FOR TALKIN G-MACHINES.

Specification of Letters Patent.

Patented ma at, rural Application filed July 24:, 1909. Serial No. 509,363.

To all whom it may concern:

Be it known that l, Pnnoimn Janus PACKMAN, a subject of the King of England, residing at 66 Hamilton road, Highand dale or phonograph cut record or a zigzag or Berliner cut record, and which can be easily and rapidly converted and brought into the correct position for playing from either of such records. v

According to this invention, I mount the stylus holder-in connection with thestylus bar in or on suitable bearings so that the\ stylus can be brought either into a plane parallel to the plane of the diaphragm for playing from zig-zag records, or into a position inclined at a suitable angle to the said diaphragm for reproduction from hill and dale cut. records, and I provide means for changing the position of the needle or stylus holder with great facility and for looking it in either of the required positions.

The accompanying drawing shows, by way of example, one method of carrying out my invention.

Figure l is a front elevation of a sound box fitted with a needle for reproducing from a zig-zag record. Fig. 2 is a side elevation of the same sound box with the needle replaced by a sapphire-point and the stylus holder brought into a suitable position for reproducing from hill and dale cut records. Fig. 3 shows enlarged view of a detail hereinafter referred to. Figs. 4 to 6 show partly diagrammatic views of details greatly enlarged.

The same letters of reference are employed to denote the same parts in all the views.

a is the shell of the sound box.

I) is the stylus bar.

a 'is a plate carrying a double bearing bracket with side plates (Z and e, to which double bearing bracket the stylus bar Z) is -able spring devices all of'the ordinary con- 7" is a spindle provided with a handle g. This spindle is prolonged into or has formed with it a smaller stepped portion 7b which fits into a corresponding circular hole in the side plate 6. 0

7c is another circular part somewhat smaller than the part it and placed concentrically to the-parts h and f, and having its bearing in a circular hole in the plate (Z, the extremity of the spindle is provided with a screw thread at m, by means of which the spindle is secured 'in position by a suitable nut.. Between the concentric parts it and 7c is another circular portion p, but formed or placed eccentrically with respect to these portions so as to form a kind of minute crank. Threaded on this portion 32 is a plate g shaped as shown in the drawing with faces r, s, t and u inclined to one another. This plate is formed in one with the stylus or needle holder o.

' w is a pin 011 the spindle f and m is a stop 'on the side plate 6. The plate 0 is mounted -on suitable bearings and provided with suitstruction. p

The action of the device will-he readily understood :Assuming the parts are in the position shown at Fig. 1 and it is required to bring them into the position shown at Fig. 2 for use for reproduction from hill and dale out records, it will be observed that the surfaces 0" and t are held tightly against the side and top of the double hearing, so that the needle holder is held firmly in position. Now when the handle 9 is depressed the efiect is to lower the plate 9 and stylus holder o, thus drawing the surface t away from the top plate. At the same time the crank-like movement of the eccentric portion 3? draws the surface r away from the side plate. It will now be seen that the needle holder and plate u can be turned around into an angular position and then when the handle 9 is again pushed up the face M comes against the too surface and the face 8 against the side surtace, thus locking the needle holder and plate in the new position, that is the exact correct position for reproducing from a hill and dale record, the surfaces be.-

ing suitably out on the plate 9 for this purpose. The downward movement of the lever gis stopped by the pin in coming against the stop an.

I It will be observed that the present conv struction involves advantages over my British Patent Number 7479 of 1907, in that the lever g locks the stylus by an upward jamming movement away from the record and in the exactpositions for playing both kinds of records, while in the patent above it was necessary to slightly unscrew the stylus holder and then to turn it together with the plate on which it was secured about a center, andthen to screw up tight the said holder. In these operations one was liable to get the stylus in an incorrect position. Furthermore, the screw for tightening the needle was liable after use to give trouble, which liability is entirely overcome by providing the construction now disclosed; and by moving the lever g away from the record all liability of touching the latter is obviated.

It will be understood that the foregoing description merely shows one way of carrying out my invention as the details and method of application of my invention may be varied largely to suit requirements without departing from the principle thereof.

What I claim and desire to secure by Letters Patent of the United States of Americe is 1. In a sound box provided with a shell containing a diaphragm; the combination of a stylus bar having a double bearing; a spin dle'p'rovided with an eccentric Working in said bearing; and a lever rigid with said spindle adapted to lock said stylus in two diflerentpositions upon moving the same in a direction away from the record over which said stylus plays, substantially as described.

2. A sound box comprising a shell containing a diaphragm, a stylus bar, a double bearing attached to said stylus bar, a spindle provided with an eccentric working in the said bearing, a plate on the said spindle carrying the stylus holder and means comprising a lever for locking the plate and stylus holder in either of two positions for the purpose set forth.

3. A sound box comprising a shell containing a diaphragm, a stylus bar, double I bearing attached to said stylus-bar, a spindle working in the said bearing, the said. spindle having an eccentric portion coining between the'bearing plates, such eecei'itric portion passing throu h a plate carrying the stylus holder, such p ate being provided with two pairs of surfaces inclined to one another in sucha way that by actuating a suitable handle the plate and stylus holder can be locked in either of two required positions substantially as and for the purpose set forth.

In testimony whereof, I ailix my signature, in presence of two Witnesses.

PERCIVAL JAMES PACKMAN. Witnesses:

A. E. VIDAL, L. SIMMoNos. 

